[REQUEST]Educational Android app

Hello Guys,
Has anyone come across a really cool educational android app, preferably something that will give my mind a workout?

I’ve been playing this awesome math game:
http s://p lay.google.com/store/apps/details?id =com.epicapps.mathfun
Rock solid in my book, can’t do better than this.

Cool! Downloading now, expect feedback soon!

I recommend Astroloquiz. My experience with this app is amazing. I thought my girl is not that kind to others. Well, that’s my observation to her but when she used this app as I’m guiding her; I was surprised by her response to the quiz because in reality she never do that then I review the overall result which is her personality. Now I understand her attitude and I can talk to her now more easily unlike before.